Pavlov paired the sound of a metronome with food. This technique produced learning-that is, a change in the

Which model of successful aging focuses on the assumption that late adulthood brings changes and losses in underlying capabilities that vary from person to person?

A. continuity theory B. activity theory C. selective optimization with compensation D. compensational theory

In statistical calculations, the square root of the variance is called the

a. standard deviation. b. standard variation. c. derived variation. d. compensatory variance.

What is the most obvious signal to a girl that puberty has begun?

A. increase in height B. onset of menstruation C. increase in weight D. breast development

Subjective well-being is _____ related to physical health

a) negatively b) positively c) adversely d) ambiguously